i dont like engine modded X5. that will cause more problems than it already does. i have 3 yrs/100,000 mile 3rd party power train warranty after i purchased it about more than a year ago. i now have 77K miles on it i think when it hits 99K it will be for sale. dont get me wrong, i love everything about the x to the point that i wash it almost every 2 days and change engine oil every 3K miles with OEM oil and filter while the recommend change every 12K, but i dont want no part of the big repair bills after warranty expires.